International Registry of World Citizens. (2001). Register van Wereldburgers: Nieuwsbrief. Hove: International Registry of World Citizens.
Citazione stile Chigago Style (17a edizione)International Registry of World Citizens. Register Van Wereldburgers: Nieuwsbrief. Hove: International Registry of World Citizens, 2001.
Citatione MLA (8a ed.)International Registry of World Citizens. Register Van Wereldburgers: Nieuwsbrief. Hove: International Registry of World Citizens, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.